A researcher at a company plans to run some trials and wants to randomly select 763 people from the general population. The researcher wants to know the probability that the percentage of smokers in their selection is at least 25%. Assume that the percentage of smokers in the general population is 30%. Use a BSM to find this probability.

s

step-by-step explanation:

the answer for your question is

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0